Saturday , March 6 2021

One of the oldest exoplanets ever found

The outer planet – along with two other planets – revolves around a star about 10 billion years old.

Scientists have discovered several ancient planets around an orange dwarf star. These are three planets, one of which is a giant hot rocky earth called TOI-561b. “TOI-561b is one of the oldest rock planets ever found,” said researcher Lauren Weiss.

Scientists estimate that the entire TOI-561 system is about 10 billion years old. This makes it one of the oldest known systems. That is why finding an ancient rocky super-earth is very special. Because that means rocky planets – like our planet – have a long life. In addition, the early rock planets saw daylight for a long time. Weiss concluded, “The existence of these exoplanets shows that the universe has produced rocky planets almost since birth.”

What is Super Earth?
A giant earth is a rocky planet with a mass greater than the mass of the earth but smaller than that of Uranus or Neptune. They also have a hard surface. The first giant earth was discovered in 2005. At the same time, five terrestrial planets have been discovered – including the most promising ones. K2-18b – livable. They are close to their parents ’stars in the living area.

in the study Researchers were also able to reveal some interesting features of TOI-561b. It turns out that the planet is about 50 percent larger than Earth. In addition, wear of the TOI-561b in less than half a day filled the circle around its main star. It’s too short. “Every day when you’re on Earth, the planet orbits twice twice,” explained scientist Stephen Kane.

So the TOI-561b orbits its stars in a very close orbit. This means that the temperature on this planet can rise dramatically. The average surface temperature is estimated to be above 1700 ° C.

mass type
Although TOI-561b is almost three times the mass of the Earth, the team calculated that it is the same density as our planet. This is very cool. “It was surprising because you hoped (higher mass, red) that the density would be higher,” Kane said. “This fits the idea that the planet is very old.” Because the planet is older, its density must be lower. “This is because many of the heavy elements that give birth to planets will not be available for a long time,” Kane explained. Heavy elements consist of the joining of stars with age. Finally, the stars exploded, throwing these elements around the universe. Then new dust and planets were born from this dust.

Unfortunately, researchers suspect that TOI-561b is not applicable. It would be too hot to absorb life as we know it. However, this does not mean that the planet is always uninhabited. Maybe this may have happened earlier. So astronomers are constantly trying to understand the relationship between the mass and radius of the planets they find. This information provides more information, using current technologies, about the internal structure of the planets away from the visit. “Information about the planet’s interior gives us an idea of ​​whether its surface is viable for life,” Kane explained. “Although TOI-561b cannot be populated today, it can be considered a predecessor. Perhaps there are still many rocky worlds around the oldest stars in the universe waiting to be discovered. “

The ancient planet was discovered with the help of a planet hunter Transition from exoplanet research to satellites (goat). TESS was launched in April 2018, and the search for nearby planets opened in July of that year. Since then, telescopes have found many exoplanets. Last April, a planet hunter was the first to find the Earth and trace it first. Exocometin Di. Many discoveries will follow for sure. In a few years, TESS will study at least 500,000 nearest stars and reveal the Earth and the superplanes around them. TESS is also expected to detect hundreds of thousands of binary stars, leaving many other planets orbiting the binary system awaiting discovery.

to know more…

… About the Tess Space Telescope? Read more about this promising planet hunter and his explorations of unknown worlds here!

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